Absolute encoder
The goal is smart
Koco Motion now offers the Lexium-MDrive stepper motors (LMD) from Schneider Electric with a multiturn absolute encoder. This expands the performance of the integrated stepper motors - while retaining the same dimensions.
The multiturn absolute encoder function with a line count of 1000 has been integrated into the "all-in-one" motor. This provides users with a fully-fledged servo system based on the advantages of a stepper motor positioning drive with absolute path measurement. This opens up new application possibilities in machines and systems. The well-known IP protection classes up to IP67 enable use even in harsh environments. The rotary and linear stepper motors are already available in Nema sizes 17 (42 millimetres) and 23 (57 millimetres). The Nema 34 motors (86 millimetres) will also be equipped with absolute encoders in future and will be available from the first quarter of 2019. The LMD with integrated multiturn absolute encoder follows the trend of integrating more and more components into individual units and thus making the drives "smart". This improves operation while reducing costs at the same time. This is because the absolute encoders replace sensors or limit switches.
LMD drives with absolute encoders record and save position data even when switched off. This eliminates the need for reference runs after the control system is switched off. The system is immediately ready for use and the set-up time at system start is reduced. The LMD stepper motors with absolute encoders have fully programmable motion control and can be operated in various modes: in closed loop, via torque control and variable current control for energy savings as well as with reduced heating. Various communication protocols are available for network capability. pb








